Grain boundary sliding revisited: developments in sliding over four decades


Langdon, Terence G. (2006) Grain boundary sliding revisited: developments in sliding over four decades. Journal of Materials Science, 41, (3), 597-609. (doi:10.1007/s10853-006-6476-0).

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Description/Abstract

It is now recognized that grain boundary sliding (GBS) is often an important mode of deformation in polycrystalline materials. This paper reviews the developments in GBS over the last four decades including the procedures available for estimating the strain contributed by sliding to the total strain, ξ, and the division into Rachinger GBS in conventional creep and Lifshitz GBS in diffusion creep. It is shown that Rachinger GBS occurs under two distinct conditions in conventional creep depending upon whether the grain size, d, is larger or smaller than the equilibrium subgrain size, λ. A unified model is presented leading to separate rate equations for Rachinger GBS in power-law creep and superplasticity. It is demonstrated that these two equations are in excellent agreement with experimental observations. There are additional recent predictions, not fully resolved at the present time, concerning the role of GBS in nanostructured materials.

Item Type: Article
Additional Information: 40th anniversary issue, guest editor M. Grant Norton
ISSNs: 0022-2461 (print)
Related URLs:
Subjects: T Technology > TN Mining engineering. Metallurgy
Divisions: University Structure - Pre August 2011 > School of Engineering Sciences > Engineering Materials & Surface Engineering
ePrint ID: 43644
Date Deposited: 29 Jan 2007
Last Modified: 27 Mar 2014 18:28
URI: http://eprints.soton.ac.uk/id/eprint/43644

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